array(3) {
  [0]=>
  int(4370)
  [1]=>
  string(165) "Guo L., Ni J., Shi Y. Q. Uniform embedding for efficient JPEG steganography // IEEE Transactions on Information Forensics and Security. 2014. vol. 9(5). pp. 814-825."
  [2]=>
  int(4)
}
<h1>DB Error 230: Duplicate entry '4370-4' for key 'citations.citations_submission_seq'</h1>